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\(\dfrac{14}{28}=\dfrac{14:14}{28:14}=\dfrac{1}{2}\)
\(\dfrac{33}{99}=\dfrac{33:33}{99:33}=\dfrac{1}{3}\)
\(\dfrac{12}{80}=\dfrac{12:4}{80:4}=\dfrac{3}{20}\)
\(\dfrac{50}{150}=\dfrac{50:50}{150:50}=\dfrac{1}{3}\)
\(\dfrac{45}{9}=\dfrac{45:9}{9:9}=5\)
\(\dfrac{81}{72}=\dfrac{81:9}{72:9}=\dfrac{9}{8}\)
\(\dfrac{34}{68}=\dfrac{34:34}{68:34}=\dfrac{1}{2}\)
\(\dfrac{14}{28}=\dfrac{1}{2};\dfrac{33}{99}=\dfrac{11}{33};\dfrac{12}{80}=\dfrac{3}{20};\dfrac{50}{150}=\dfrac{1}{3};\dfrac{45}{9}=5;\dfrac{81}{72}=\dfrac{9}{8};\dfrac{34}{68}=\dfrac{1}{2}\)
\(\frac{202}{505}\)
\(=\frac{202\div101}{505\div101}\)
\(=\frac{2}{5}\)
\(\frac{202}{505}=\frac{202:101}{505:101}=\frac{2}{5}\)
~~ Chúc bạn học tốt ~~